a hanky / handkerchief you use to masturbate with so you don't squirt your cum over yourself and your clothes
It is usually an attractive hanky with a nice pattern and used solely for masturbation to catch your hanky cum

I was thinking about Maria in accounts earlier - she's looking hot today. I got turned on and had to go to the bathroom and get out my wanky

In the fandom community, person A would describe person B or person B's behavior as "wanky" if any of the following conditions are met:

- Person B expresses an opinion that person A disagrees with
- Person B expresses an emotion on a public forum or blog
- Person B has an argument with Person C over any subject on a public forum or blog

Also, "wank" is the noun used to refer to the behavior itself.

"Those people got into an argument; it was so wanky, let's make fun of them!"

"Those people got upset because of a website being homophobic; that's so wanky, let's make fun of them!"